Always treat FallbackRecentsView as visible if isInLiveTileMode is true

- activity.hasBeenResumed is no longer an accurate indicator after live tile has been introduced, indeed it's always false
- Return recentsView regardless if there is a runningTask as well

Bug: 194286330
Test: In fallback Recents with 3 button, tap overview button from home screen, then tap overview button again. Try combination with back and home button
Change-Id: Ib2775a11f5466abc433763f24192e7bfdcf191a2